Please don't take offense. If you're happy, we're happy. (Or at least, I'M happy - don't want to speak for The Collective.Well, this thread has been a good reminder of why I tend not to share this information with people.)
It's just that you didn't sound very happy. If you don't mind me asking, did you and your wife talk about poly first, you agreed, and then she found a boyfriend, or was the order reversed? (Or was some step in that missing altogether?)
No offense taken. And I am happy. I'm not saying it's what I expected or initially wanted, but that's life.
Without going into too much detail, apparently she had felt like she might want to be poly for a long time, but never found anyone else she wanted to be with in that way, so she never brought it up. She did meet someone, and then asked me what I thought of it. But she hadn't started the relationship yet; she wanted my approval first. And I respect her for doing that - it took a lot of bravery, knowing that it could have ruined everything for a possibility. I probably would have reacted differently if she had already begun things.
That you have to "struggle" with your wife's desire to sleep with others, while denying you the same freedom, is a bad sign.
There's no denying happening, since I'm not seeking that "freedom". I don't want anyone else. And my struggle is with accepting the changes and sacrifices I've had to make to accommodate the lifestyle, not her love for someone else (although I do admit that early on, I did have to struggle with that part. But I've accepted that.)